In a large bowl, whisk together the marinade ingredients. Remove and set aside 3 tablespoons. Add the shrimp and toss to coat.
Heat the vegetable or avocado oil in a large skillet over medium heat. Add the bell peppers, onions, and 1/2 teaspoon of salt. Saute until softened, about 5 minutes. Transfer to a plate and set aside.
Add the shrimp and marinade from the bowl. Cook on each side for about 2 minutes, until the shrimp is pink and fully cooked through.
Remove your pan from heat and add the veggies back to the skillet. Toss to combine with the shrimp. Drizzle with reserved marinade, and serve with toppings (such as tortillas, salsa, avocado, cilantro, and sour cream). Enjoy!